Not sure if it's not _too_ simple, but Möbius bracelets are quite easy and the way you make them without stitching is very satisfying.
@grrrr_shark I should go back to trying to discover crocheting on my own~~ I did try a bit some time ago, but ended up not having enough time and in practice postponed it indefinitely.
@robryk Yeah, I had a similar experience. I did it some during the pandemic because an astrophysicist friend recommended it to me, but now during burnout recovery, I needed something to do with my hands that wasn't brain-based.
And I'm enjoying it - I'm starting to get a feel for what the stitches actually DO, which is immensely satisfying :)